Our owner’s manual also states that the bedroom slides are electric, but they are actually hydraulic. Some PTs of this era the bedroom slides are electric, some are hydraulic.
Paul has noted that his slide has a single a single hydraulic ram which seems to indicate that it is hydraulic.
The slide works, so a quick and easy way to determine the type is to have one person operate the slide and have another listen for the hydraulic pump. If the pump runs it hydraulic, if not it’s electric.
Paul, if you are going under the coach be very careful, the coach is suspended by the air springs and a sudden loss of air can be disastrous. Also, if you determine that the bed slide is hydraulic, carefully read the HWH instructions. Before removing the solenoid values, you need to release the pressure from both the extend and retract valves, this can allow the slide to move on its own. Be extra careful if you have the generator slide open to gain access to the pump/manifold, if you accidently release the valves for the generator slide it can retract and could crush you.